Metatorbernite

metatorbernite

phosphate

torbernite

meta-autunite

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Formula: Cu(UO2)2(PO4)2.8H2O
Hydrated normal phosphate, the prefix "meta" indicates that the mineral is a dehydration product of torbernite; meta-autunite group, forms a series with metazeunerite
Specific gravity: 3.52 to 3.70
Hardness: 2½
Streak: Pale green
Colour: Pale green to dark green
Solubility: Moderately soluble in hydrochloric, sulphuric and nitric acids
Common impurities: Ca,Ba,Mg
RADIOACTIVE
Environments

Igeous environments
Hydrothermal environments

Metatorbernite typically is a secondary mineral, formed as a dehydration product of torbernite, which is unstable; it also may be formed directly above 75oC. Associated minerals include torbernite and meta-autunite (HOM).

Localities

There are two co-type localities, Schneeberg, Erzgebirgskreis, Saxony, Germany, and Redruth, Cornwall, England, UK.

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